Init the _etherTokenContractsByAddress
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@@ -27,7 +27,7 @@ import {TokenWrapper} from './token_wrapper';
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* The caller can convert ETH into the equivalent number of wrapped ETH ERC20 tokens and back.
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*/
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export class EtherTokenWrapper extends ContractWrapper {
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private _etherTokenContractsByAddress: {[address: string]: EtherTokenContract};
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private _etherTokenContractsByAddress: {[address: string]: EtherTokenContract} = {};
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private _tokenWrapper: TokenWrapper;
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constructor(web3Wrapper: Web3Wrapper, networkId: number, abiDecoder: AbiDecoder, tokenWrapper: TokenWrapper) {
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super(web3Wrapper, networkId, abiDecoder);
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